Enable replication of SSE-C objects (#19107)

If site replication enabled across sites, replicate the SSE-C
objects as well. These objects could be read from target sites
using the same client encryption keys.

Signed-off-by: Shubhendu Ram Tripathi <shubhendu@minio.io>

cmd/object-api-options.go

@@ -480,7 +480,7 @@ func completeMultipartOpts(ctx context.Context, r *http.Request, bucket, object
 	}
 	opts.MTime = mtime
 	opts.UserDefined = make(map[string]string)
-
+	opts.UserDefined[ReservedMetadataPrefix+"Actual-Object-Size"] = r.Header.Get(xhttp.MinIOReplicationActualObjectSize)
 	// Transfer SSEC key in opts.EncryptFn
 	if crypto.SSEC.IsRequested(r.Header) {
 		key, err := ParseSSECustomerRequest(r)
@@ -491,5 +491,8 @@ func completeMultipartOpts(ctx context.Context, r *http.Request, bucket, object
 			}
 		}
 	}
+	if _, ok := r.Header[xhttp.MinIOSourceReplicationRequest]; ok {
+		opts.ReplicationRequest = true
+	}
 	return opts, nil
 }